PSYC 1 Lecture Notes - Lecture 5: Agnosia, Depth Perception, Railways Act 1921
Document Summary
Sensation process by which sensory receptors and nervous system receive and represent stimulus energies from our environment. Perception process by which our brain organizes and interprets sensory information, transforming it to meaningful objects and events. Bottom-up processing (sensory) begins with sensory receptors and works up to the brain"s integration of sensory information. First finding the edges and corners of a puzzle. Top-down processing (perception) information processing guided by high-level mental processes as when we construct perceptions by drawing on experience and expectations. Transduction converting one form of energy to another form the brain can use. Sensory adaptation reduced sensitivity; response to constant stimulation. Absolute threshold minimum stimulus energy needed to detect particular stimulus 50% of the time. Difference threshold minimum difference between two stimuli required for detection. Subliminal perception below a person"s absolute threshold for conscious awareness. Perceptual set set of mental tendencies and assumptions that affect, top-down, what we hear, taste, feel, and see.
